ez80f91 ZiLOG Semiconductor, ez80f91 Datasheet - Page 183

• Manufacturer Part Number: ez80f91
• Description: Ez80 Acclaimplus!? Connectivity Assp Ez80f91 Assp
• Manufacturer: ZiLOG Semiconductor

Universal Asynchronous
Receiver/Transmitter
PS027001-0707
The UART module implements all of the logic required to support the asynchronous com-
munications protocol. The module also implements two separate 16-byte-deep FIFOs for
both transmission and reception. A block diagram of the UART is illustrated in
The UART module provides the following asynchronous communications protocol-
related features and functions:
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•
•
•
•
•
5-, 6-, 7-, 8- or 9-bit data transmission.
Even/odd, space/mark, address/data, or no parity bit generation and detection.
Start and stop bit generation and detection (supports up to two stop bits).
Line break detection and generation.
Receiver overrun and framing errors detection.
Logic and associated I/O to provide modem handshake capability.
Interrupt Signal
System Clock
I/O Address
Data
Figure 36. UART Block Diagram
Universal Asynchronous Receiver/Transmitter
Transmit
Receive
Modem
Control
Buffer
Buffer
Logic
Product Specification
eZ80F91 ASSP
RxD0/RxD1
TxD0/TxD1
CTS0/CTS1
RTS0/RTS1
DSR0/DSR1
DTR0/DTR1
DCD0/DCD1
RI0/RI1
Figure
36.
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